Tool-holder



(Model') E D Moss TOOL HQLDER.

Patented Feb. 5, V1384.

i No; 292,938.-

Huff!! III llIllllllm-l-n--ni WITNEssBs z ATTORNEY.

e E Pmwumolmphef, wmhing NITED STATES PATENT Orricn.;

ERASMUS D. MOSS, OF DEFIANOE, OHIO.

TOOL=HOLDER.

SPECIFICATION forming part of Letters Pate11t-No. 292,938, dated February 5, 1884.

Application filed August S, 1883. (Model.)

ilo @ZZ whom it may concern:

Be it known that I, ERASMUS D. Moss, of Deliance, in the county ofDeance and State of Ohio, have invented new and useful Improvements in Tool-Holders; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

rlhis invention relates to certain new and useful improvements in devices for holding drills while they are being ground; and the invention consists in the peculiar construction of an adjustable radial arm, and in the peculiar construction, arrangement, and combination of the various parts, all as V:more fully hereinafter set forth.

Figure lis a top plan of my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical crosssection through the line @o x of Fig. 2. Fig. 4 is a: vertical sectionV of part of theV device on the line y y, Fig. l.

In the accompanying drawings, which form a part of this specification, A represents a suitable table, semicircular in form, which is secured to the frame-work of a griudstone or emery-wheel by bolts through the slots B.

J is a radial arm pivotally secured at one end to the bed-plate, at or about the center of.`

the straight side thereof, by a bolt, J. On this table, near the center of its straight edge, is a raised piece, J 2, the object of which is to raise the arm J from the tableaud allow it to be freely moved from side to side. This arin J is provided with a locking-clamp, O, consisting of a plate secured to said arm by a screw, o, by means of which said arrn is secured to its adjusted position upon the bedplate by turning the handscrew o, which fits a tapped hole in the clamp O.

K is a slotted post sleeved upon the arin J,

. b, which passes through Vthe vertical slot in the post K', and is threaded on the exterior of its outer end to receive a bindingnut, M.

D is a threaded center which passes through the sleeve L.

H is a rest secured to the front edge of the table, and`upon the inner edge of this rest is the stop G.

In practice the drill is held back against the center-point l), while the cutting-,edge of the drill is held in contact with the stone or einer-ywheel N, and it is ground away by crowding the tool edgewise against the stone in the di-` rection of the arrow until the tool is arrested by contact with the stop G.` Vhen both edges oftlietool have thus been ground, they will `be alike in size and angle, and the point will be central.

The radial arm can easily be adjusted so that the tool maybe presented to the stone from either side, as desired.

Vhat I claim as my invention is" l. In combination with the table A, the adjustable radial arm J, post K, and center D, adjustable on said post, substantially as and for the purposes set forth.

2. In. combination with the table A, the radial arm J, slotted post K, center D, adjustable Vertically on said post, and rest H, when constructed, arranged, and operating substa-ntially in the manner and for the purposes specified.

ERASMUS MOSS.

Witnesses:

F. G. BROWN, OHARLEs SEYMOUR. 

